diff --git a/servo/components/script/dom/bindings/error.rs b/servo/components/script/dom/bindings/error.rs
index 3fe23eaca2aa..3ea2652ee23b 100644
--- a/servo/components/script/dom/bindings/error.rs
+++ b/servo/components/script/dom/bindings/error.rs
@@ -31,6 +31,8 @@ pub enum Error {
     NotFound,
     /// HierarchyRequestError DOMException
     HierarchyRequest,
+    /// WrongDocumentError DOMException
+    WrongDocument,
     /// InvalidCharacterError DOMException
     InvalidCharacter,
     /// NotSupportedError DOMException
@@ -53,6 +55,8 @@ pub enum Error {
     Abort,
     /// TimeoutError DOMException
     Timeout,
+    /// InvalidNodeTypeError DOMException
+    InvalidNodeType,
     /// DataCloneError DOMException
     DataClone,
     /// NoModificationAllowedError DOMException
@@ -81,6 +85,7 @@ pub fn throw_dom_exception(cx: *mut JSContext, global: GlobalRef,
         Error::IndexSize => DOMErrorName::IndexSizeError,
         Error::NotFound => DOMErrorName::NotFoundError,
         Error::HierarchyRequest => DOMErrorName::HierarchyRequestError,
+        Error::WrongDocument => DOMErrorName::WrongDocumentError,
         Error::InvalidCharacter => DOMErrorName::InvalidCharacterError,
         Error::NotSupported => DOMErrorName::NotSupportedError,
         Error::InUseAttribute => DOMErrorName::InUseAttributeError,
@@ -92,6 +97,7 @@ pub fn throw_dom_exception(cx: *mut JSContext, global: GlobalRef,
         Error::Network => DOMErrorName::NetworkError,
         Error::Abort => DOMErrorName::AbortError,
         Error::Timeout => DOMErrorName::TimeoutError,
+        Error::InvalidNodeType => DOMErrorName::InvalidNodeTypeError,
         Error::DataClone => DOMErrorName::DataCloneError,
         Error::NoModificationAllowed => DOMErrorName::NoModificationAllowedError,
         Error::Type(message) => {
diff --git a/servo/components/script/dom/document.rs b/servo/components/script/dom/document.rs
index a414f782012d..692c597d7af4 100644
--- a/servo/components/script/dom/document.rs
+++ b/servo/components/script/dom/document.rs
@@ -1166,7 +1166,7 @@ impl<'a> DocumentMethods for JSRef<'a, Document> {
 
     // https://dom.spec.whatwg.org/#dom-document-createrange
     fn CreateRange(self) -> Temporary<Range> {
-        Range::new(self)
+        Range::new_with_doc(self)
     }
 
     // https://dom.spec.whatwg.org/#dom-document-createtreewalker
diff --git a/servo/components/script/dom/node.rs b/servo/components/script/dom/node.rs
index 23914d3f4075..9143677d1e03 100644
--- a/servo/components/script/dom/node.rs
+++ b/servo/components/script/dom/node.rs
@@ -427,6 +427,8 @@ pub trait NodeHelpers {
     fn is_parent_of(self, child: JSRef<Node>) -> bool;
 
     fn type_id(self) -> NodeTypeId;
+    fn len(self) -> u32;
+    fn index(self) -> u32;
 
     fn parent_node(self) -> Option<Temporary<Node>>;
     fn first_child(self) -> Option<Temporary<Node>>;
@@ -567,6 +569,22 @@ impl<'a> NodeHelpers for JSRef<'a, Node> {
         self.type_id
     }
 
+    // https://dom.spec.whatwg.org/#concept-node-length
+    fn len(self) -> u32 {
+        match self.type_id {
+            NodeTypeId::DocumentType => 0,
+            NodeTypeId::CharacterData(_) => {
+                CharacterDataCast::to_ref(self).unwrap().Length()
+            },
+            _ => self.children().count() as u32
+        }
+    }
+
+    // https://dom.spec.whatwg.org/#concept-tree-index
+    fn index(self) -> u32 {
+        self.preceding_siblings().count() as u32
+    }
+
     fn parent_node(self) -> Option<Temporary<Node>> {
         self.parent_node.get().map(Temporary::from_rooted)
     }
diff --git a/servo/components/script/dom/range.rs b/servo/components/script/dom/range.rs
index f79e6685a288..c9124f1eb3dd 100644
--- a/servo/components/script/dom/range.rs
+++ b/servo/components/script/dom/range.rs
@@ -2,44 +2,512 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::codegen::Bindings::RangeBinding;
+use dom::bindings::codegen::Bindings::NodeBinding::NodeConstants;
+use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
+use dom::bindings::codegen::Bindings::RangeBinding::{self, RangeConstants};
 use dom::bindings::codegen::Bindings::RangeBinding::RangeMethods;
 use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
-use dom::bindings::error::Fallible;
+use dom::bindings::codegen::InheritTypes::NodeCast;
+use dom::bindings::error::{Error, ErrorResult, Fallible};
 use dom::bindings::global::GlobalRef;
-use dom::bindings::js::{JSRef, Rootable, Temporary};
+use dom::bindings::js::{JS, JSRef, MutHeap, Rootable, Temporary};
 use dom::bindings::utils::{Reflector, reflect_dom_object};
 use dom::document::{Document, DocumentHelpers};
+use dom::node::{Node, NodeHelpers};
+
+use std::cell::RefCell;
+use std::cmp::{Ord, Ordering, PartialEq, PartialOrd};
+use std::rc::Rc;
 
 #[dom_struct]
 pub struct Range {
-    reflector_: Reflector
+    reflector_: Reflector,
+    inner: Rc<RefCell<RangeInner>>,
 }
 
 impl Range {
-    fn new_inherited() -> Range {
+    fn new_inherited(start_container: JSRef<Node>, start_offset: u32,
+                     end_container: JSRef<Node>, end_offset: u32) -> Range {
         Range {
-            reflector_: Reflector::new()
+            reflector_: Reflector::new(),
+            inner: Rc::new(RefCell::new(RangeInner::new(
+                BoundaryPoint::new(start_container, start_offset),
+                BoundaryPoint::new(end_container, end_offset)))),
         }
     }
 
-    pub fn new(document: JSRef<Document>) -> Temporary<Range> {
+    pub fn new_with_doc(document: JSRef<Document>) -> Temporary<Range> {
+        let root = NodeCast::from_ref(document);
+        Range::new(document, root, 0, root, 0)
+    }
+
+    pub fn new(document: JSRef<Document>,
+               start_container: JSRef<Node>, start_offset: u32,
+               end_container: JSRef<Node>, end_offset: u32)
+               -> Temporary<Range> {
         let window = document.window().root();
-        reflect_dom_object(box Range::new_inherited(),
+        reflect_dom_object(box Range::new_inherited(start_container, start_offset,
+                                                    end_container, end_offset),
                            GlobalRef::Window(window.r()),
                            RangeBinding::Wrap)
     }
 
+    // https://dom.spec.whatwg.org/#dom-range
     pub fn Constructor(global: GlobalRef) -> Fallible<Temporary<Range>> {
         let document = global.as_window().Document().root();
-        Ok(Range::new(document.r()))
+        Ok(Range::new_with_doc(document.r()))
+    }
+}
+
+pub trait RangeHelpers<'a> {
+    fn inner(self) -> &'a Rc<RefCell<RangeInner>>;
+}
+
+impl<'a> RangeHelpers<'a> for JSRef<'a, Range> {
+    fn inner(self) -> &'a Rc<RefCell<RangeInner>> {
+        &self.extended_deref().inner
     }
 }
 
 impl<'a> RangeMethods for JSRef<'a, Range> {
-    /// https://dom.spec.whatwg.org/#dom-range-detach
+    // http://dom.spec.whatwg.org/#dom-range-startcontainer
+    fn StartContainer(self) -> Temporary<Node> {
+        self.inner().borrow().start.node()
+    }
+
+    /// http://dom.spec.whatwg.org/#dom-range-startoffset
+    fn StartOffset(self) -> u32 {
+        self.inner().borrow().start.offset
+    }
+
+    /// http://dom.spec.whatwg.org/#dom-range-endcontainer
+    fn EndContainer(self) -> Temporary<Node> {
+        self.inner().borrow().end.node()
+    }
+
+    /// http://dom.spec.whatwg.org/#dom-range-endoffset
+    fn EndOffset(self) -> u32 {
+        self.inner().borrow().end.offset
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-collapsed
+    fn Collapsed(self) -> bool {
+        let inner = self.inner().borrow();
+        inner.start == inner.end
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-commonancestorcontainer
+    fn CommonAncestorContainer(self) -> Temporary<Node> {
+        self.inner().borrow().common_ancestor_container()
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-setstartnode-offset
+    fn SetStart(self, node: JSRef<Node>, offset: u32) -> ErrorResult {
+        if node.is_doctype() {
+            // Step 1.
+            Err(Error::InvalidNodeType)
+        } else if offset > node.len() {
+            // Step 2.
+            Err(Error::IndexSize)
+        } else {
+            // Step 3-4.
+            self.inner().borrow_mut().set_start(node, offset);
+            Ok(())
+        }
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-setendnode-offset
+    fn SetEnd(self, node: JSRef<Node>, offset: u32) -> ErrorResult {
+        if node.is_doctype() {
+            // Step 1.
+            Err(Error::InvalidNodeType)
+        } else if offset > node.len() {
+            // Step 2.
+            Err(Error::IndexSize)
+        } else {
+            // Step 3-4.
+            self.inner().borrow_mut().set_end(node, offset);
+            Ok(())
+        }
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-setstartbeforenode
+    fn SetStartBefore(self, node: JSRef<Node>) -> ErrorResult {
+        let parent = try!(node.parent_node().ok_or(Error::InvalidNodeType)).root();
+        self.SetStart(parent.r(), node.index())
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-setstartafternode
+    fn SetStartAfter(self, node: JSRef<Node>) -> ErrorResult {
+        let parent = try!(node.parent_node().ok_or(Error::InvalidNodeType)).root();
+        self.SetStart(parent.r(), node.index() + 1)
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-setendbeforenode
+    fn SetEndBefore(self, node: JSRef<Node>) -> ErrorResult {
+        let parent = try!(node.parent_node().ok_or(Error::InvalidNodeType)).root();
+        self.SetEnd(parent.r(), node.index())
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-setendafternode
+    fn SetEndAfter(self, node: JSRef<Node>) -> ErrorResult {
+        let parent = try!(node.parent_node().ok_or(Error::InvalidNodeType)).root();
+        self.SetEnd(parent.r(), node.index() + 1)
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-collapsetostart
+    fn Collapse(self, to_start: bool) {
+        self.inner().borrow_mut().collapse(to_start);
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-selectnodenode
+    fn SelectNode(self, node: JSRef<Node>) -> ErrorResult {
+        self.inner().borrow_mut().select_node(node)
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-selectnodecontentsnode
+    fn SelectNodeContents(self, node: JSRef<Node>) -> ErrorResult {
+        self.inner().borrow_mut().select_node_contents(node)
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-compareboundarypointshow-sourcerange
+    fn CompareBoundaryPoints(self, how: u16, source_range: JSRef<Range>)
+                             -> Fallible<i16> {
+        if how > RangeConstants::END_TO_START {
+            // Step 1.
+            return Err(Error::NotSupported);
+        }
+        let this_inner = self.inner().borrow();
+        let other_inner = source_range.inner().borrow();
+        let this_start_node = this_inner.start.node().root();
+        let other_start_node = other_inner.start.node().root();
+        let this_root = this_start_node.r().inclusive_ancestors().last().unwrap();
+        let other_root = other_start_node.r().inclusive_ancestors().last().unwrap();
+        if this_root != other_root {
+            // Step 2.
+            return Err(Error::WrongDocument);
+        }
+        // Step 3.
+        let (this_point, other_point) = match how {
+            RangeConstants::START_TO_START => {
+                (&this_inner.start, &other_inner.start)
+            },
+            RangeConstants::START_TO_END => {
+                (&this_inner.end, &other_inner.start)
+            },
+            RangeConstants::END_TO_END => {
+                (&this_inner.end, &other_inner.end)
+            },
+            RangeConstants::END_TO_START => {
+                (&this_inner.start, &other_inner.end)
+            },
+            _ => unreachable!(),
+        };
+        // step 4.
+        match this_point.partial_cmp(other_point).unwrap() {
+            Ordering::Less => Ok(-1),
+            Ordering::Equal => Ok(0),
+            Ordering::Greater => Ok(1),
+        }
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-clonerange
+    fn CloneRange(self) -> Temporary<Range> {
+        let inner = self.inner().borrow();
+        let start = &inner.start;
+        let end = &inner.end;
+        let start_node = start.node().root();
+        let owner_doc = NodeCast::from_ref(start_node.r()).owner_doc().root();
+        Range::new(owner_doc.r(), start_node.r(), start.offset,
+                   end.node().root().r(), end.offset)
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-ispointinrangenode-offset
+    fn IsPointInRange(self, node: JSRef<Node>, offset: u32) -> Fallible<bool> {
+        match self.inner().borrow().compare_point(node, offset) {
+            Ok(Ordering::Less) => Ok(false),
+            Ok(Ordering::Equal) => Ok(true),
+            Ok(Ordering::Greater) => Ok(false),
+            Err(Error::WrongDocument) => {
+                // Step 2.
+                Ok(false)
+            }
+            Err(error) => Err(error),
+        }
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-comparepointnode-offset
+    fn ComparePoint(self, node: JSRef<Node>, offset: u32) -> Fallible<i16> {
+        self.inner().borrow().compare_point(node, offset).map(|order| {
+            match order {
+                Ordering::Less => -1,
+                Ordering::Equal => 0,
+                Ordering::Greater => 1,
+            }
+        })
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-intersectsnodenode
+    fn IntersectsNode(self, node: JSRef<Node>) -> bool {
+        let inner = self.inner().borrow();
+        let start = &inner.start;
+        let start_node = start.node().root();
+        let start_offset = start.offset;
+        let start_node_root = start_node.r().inclusive_ancestors().last().unwrap().root();
+        let node_root = node.inclusive_ancestors().last().unwrap().root();
+        if start_node_root.r() != node_root.r() {
+            // Step 1.
+            return false;
+        }
+        let parent = match node.parent_node() {
+            Some(parent) => parent,
+            None => {
+                // Step 3.
+                return true;
+            },
+        }.root();
+        // Step 4.
+        let offset = node.index();
+        let end = &inner.end;
+        let end_node = end.node().root();
+        let end_offset = end.offset;
+        match (bp_position(parent.r(), offset + 1, start_node.r(), start_offset).unwrap(),
+               bp_position(parent.r(), offset, end_node.r(), end_offset).unwrap()) {
+            (Ordering::Greater, Ordering::Less) => {
+                // Step 5.
+                true
+            },
+            _ => {
+                // Step 6.
+                false
+            }
+        }
+    }
+
+    // http://dom.spec.whatwg.org/#dom-range-detach
     fn Detach(self) {
         // This method intentionally left blank.
     }
 }
 
+#[jstraceable]
+#[must_root]
+#[privatize]
+pub struct RangeInner {
+    start: BoundaryPoint,
+    end: BoundaryPoint,
+}
+
+impl RangeInner {
+    fn new(start: BoundaryPoint, end: BoundaryPoint) -> RangeInner {
+        RangeInner { start: start, end: end }
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-commonancestorcontainer
+    fn common_ancestor_container(&self) -> Temporary<Node> {
+        let start_container = self.start.node().root();
+        let end_container = self.end.node().root();
+        // Step 1.
+        for container in start_container.r().inclusive_ancestors() {
+            // Step 2.
+            if container.root().r().is_inclusive_ancestor_of(end_container.r()) {
+                // Step 3.
+                return container;
+            }
+        }
+        unreachable!();
+    }
+
+    // https://dom.spec.whatwg.org/#concept-range-bp-set
+    pub fn set_start(&mut self, bp_node: JSRef<Node>, bp_offset: u32) {
+        // Steps 1-3 handled in Range caller.
+        let end_node = self.end.node().root();
+        let end_offset = self.end.offset;
+        match bp_position(bp_node, bp_offset, end_node.r(), end_offset) {
+            None | Some(Ordering::Greater) => {
+                // Step 4-1.
+                self.end.set(bp_node, bp_offset);
+            },
+            _ => {},
+        };
+        // Step 4-2.
+        self.start.set(bp_node, bp_offset);
+    }
+
+    // https://dom.spec.whatwg.org/#concept-range-bp-set
+    pub fn set_end(&mut self, bp_node: JSRef<Node>, bp_offset: u32) {
+        // Steps 1-3 handled in Range caller.
+        let start_node = self.start.node().root();
+        let start_offset = self.start.offset;
+        match bp_position(bp_node, bp_offset, start_node.r(), start_offset) {
+            None | Some(Ordering::Less) => {
+                // Step 4-1.
+                self.start.set(bp_node, bp_offset);
+            },
+            _ => {},
+        };
+        // Step 4-2.
+        self.end.set(bp_node, bp_offset);
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-collapsetostart
+    fn collapse(&mut self, to_start: bool) {
+        if to_start {
+            let start_node = self.start.node().root();
+            self.end.set(start_node.r(), self.start.offset);
+        } else {
+            let end_node = self.end.node().root();
+            self.start.set(end_node.r(), self.end.offset);
+        }
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-selectnodenode
+    fn select_node(&mut self, node: JSRef<Node>) -> ErrorResult {
+        // Steps 1, 2.
+        let parent = try!(node.parent_node().ok_or(Error::InvalidNodeType)).root();
+        // Step 3.
+        let index = node.index();
+        // Step 4.
+        self.start.set(parent.r(), index);
+        // Step 5.
+        self.end.set(parent.r(), index + 1);
+        Ok(())
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-selectnodecontentsnode
+    fn select_node_contents(&mut self, node: JSRef<Node>) -> ErrorResult {
+        if node.is_doctype() {
+            // Step 1.
+            return Err(Error::InvalidNodeType);
+        }
+        // Step 2.
+        let length = node.len();
+        // Step 3.
+        self.start.set(node, 0);
+        // Step 4.
+        self.end.set(node, length);
+        Ok(())
+    }
+
+    // https://dom.spec.whatwg.org/#dom-range-comparepointnode-offset
+    fn compare_point(&self, node: JSRef<Node>, offset: u32) -> Fallible<Ordering> {
+        let start = &self.start;
+        let start_node = start.node().root();
+        let start_offset = start.offset;
+        let start_node_root = start_node.r().inclusive_ancestors().last().unwrap().root();
+        let node_root = node.inclusive_ancestors().last().unwrap().root();
+        if start_node_root.r() != node_root.r() {
+            // Step 1.
+            return Err(Error::WrongDocument);
+        }
+        if node.is_doctype() {
+            // Step 2.
+            return Err(Error::InvalidNodeType);
+        }
+        if offset > node.len() {
+            // Step 3.
+            return Err(Error::IndexSize);
+        }
+        if let Ordering::Less = bp_position(node, offset, start_node.r(), start_offset).unwrap() {
+            // Step 4.
+            return Ok(Ordering::Less);
+        }
+        let end = &self.end;
+        let end_node = end.node().root();
+        let end_offset = end.offset;
+        if let Ordering::Greater = bp_position(node, offset, end_node.r(), end_offset).unwrap() {
+            // Step 5.
+            return Ok(Ordering::Greater);
+        }
+        // Step 6.
+        Ok(Ordering::Equal)
+    }
+}
+
+#[jstraceable]
+#[must_root]
+#[privatize]
+pub struct BoundaryPoint {
+    node: MutHeap<JS<Node>>,
+    offset: u32,
+}
+
+impl BoundaryPoint {
+    fn new(node: JSRef<Node>, offset: u32) -> BoundaryPoint {
+        debug_assert!(!node.is_doctype());
+        debug_assert!(offset <= node.len());
+        BoundaryPoint {
+            node: MutHeap::new(JS::from_rooted(node)),
+            offset: offset,
+        }
+    }
+
+    pub fn node(&self) -> Temporary<Node> {
+        Temporary::from_rooted(self.node.get())
+    }
+
+    pub fn offset(&self) -> u32 {
+        self.offset
+    }
+
+    fn set(&mut self, node: JSRef<Node>, offset: u32) {
+        debug_assert!(!node.is_doctype());
+        debug_assert!(offset <= node.len());
+        self.node.set(JS::from_rooted(node));
+        self.offset = offset;
+    }
+}
+
+#[allow(unrooted_must_root)]
+impl PartialOrd for BoundaryPoint {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        bp_position(self.node().root().r(), self.offset,
+                    other.node().root().r(), other.offset)
+    }
+}
+
+#[allow(unrooted_must_root)]
+impl PartialEq for BoundaryPoint {
+    fn eq(&self, other: &Self) -> bool {
+        self.node().root().r() == other.node().root().r() &&
+        self.offset == other.offset
+    }
+}
+
+// https://dom.spec.whatwg.org/#concept-range-bp-position
+fn bp_position(a_node: JSRef<Node>, a_offset: u32,
+               b_node: JSRef<Node>, b_offset: u32)
+               -> Option<Ordering> {
+    if a_node == b_node {
+        // Step 1.
+        return Some(a_offset.cmp(&b_offset));
+    }
+    let position = b_node.CompareDocumentPosition(a_node);
+    if position & NodeConstants::DOCUMENT_POSITION_DISCONNECTED != 0 {
+        // No order is defined for nodes not in the same tree.
+        None
+    } else if position & NodeConstants::DOCUMENT_POSITION_FOLLOWING != 0 {
+        // Step 2.
+        match bp_position(b_node, b_offset, a_node, a_offset).unwrap() {
+            Ordering::Less => Some(Ordering::Greater),
+            Ordering::Greater => Some(Ordering::Less),
+            Ordering::Equal => unreachable!(),
+        }
+    } else if position & NodeConstants::DOCUMENT_POSITION_CONTAINS != 0 {
+        // Step 3-1, 3-2.
+        let b_ancestors = b_node.inclusive_ancestors();
+        let ref child = b_ancestors.map(|child| child.root()).find(|child| {
+            child.r().parent_node().unwrap().root().r() == a_node
+        }).unwrap();
+        // Step 3-3.
+        if child.r().index() < a_offset {
+            Some(Ordering::Greater)
+        } else {
+            // Step 4.
+            Some(Ordering::Less)
+        }
+    } else {
+        // Step 4.
+        Some(Ordering::Less)
+    }
+}
diff --git a/servo/components/script/dom/webidls/Range.webidl b/servo/components/script/dom/webidls/Range.webidl
index 5ef37a47ecb0..10ed2afb6d32 100644
--- a/servo/components/script/dom/webidls/Range.webidl
+++ b/servo/components/script/dom/webidls/Range.webidl
@@ -9,76 +9,71 @@
  * http://dvcs.w3.org/hg/csswg/raw-file/tip/cssom-view/Overview.html#extensions-to-the-range-interface
  */
 
-[Constructor]
+[Constructor /*, Exposed=Window */]
 interface Range {
-  // [Throws]
-  // readonly attribute Node startContainer;
-  // [Throws]
-  // readonly attribute unsigned long startOffset;
-  // [Throws]
-  // readonly attribute Node endContainer;
-  // [Throws]
-  // readonly attribute unsigned long endOffset;
-  // readonly attribute boolean collapsed;
-  // [Throws]
-  // readonly attribute Node commonAncestorContainer;
+  readonly attribute Node startContainer;
+  readonly attribute unsigned long startOffset;
+  readonly attribute Node endContainer;
+  readonly attribute unsigned long endOffset;
+  readonly attribute boolean collapsed;
+  readonly attribute Node commonAncestorContainer;
 
-  // [Throws]
-  // void setStart(Node refNode, unsigned long offset);
-  // [Throws]
-  // void setEnd(Node refNode, unsigned long offset);
-  // [Throws]
-  // void setStartBefore(Node refNode);
-  // [Throws]
-  // void setStartAfter(Node refNode);
-  // [Throws]
-  // void setEndBefore(Node refNode);
-  // [Throws]
-  // void setEndAfter(Node refNode);
-  // void collapse(optional boolean toStart = false);
-  // [Throws]
-  // void selectNode(Node refNode);
-  // [Throws]
-  // void selectNodeContents(Node refNode);
+  [Throws]
+  void setStart(Node refNode, unsigned long offset);
+  [Throws]
+  void setEnd(Node refNode, unsigned long offset);
+  [Throws]
+  void setStartBefore(Node refNode);
+  [Throws]
+  void setStartAfter(Node refNode);
+  [Throws]
+  void setEndBefore(Node refNode);
+  [Throws]
+  void setEndAfter(Node refNode);
+  void collapse(optional boolean toStart = false);
+  [Throws]
+  void selectNode(Node refNode);
+  [Throws]
+  void selectNodeContents(Node refNode);
 
-  // const unsigned short START_TO_START = 0;
-  // const unsigned short START_TO_END = 1;
-  // const unsigned short END_TO_END = 2;
-  // const unsigned short END_TO_START = 3;
-  // [Throws]
-  // short compareBoundaryPoints(unsigned short how, Range sourceRange);
+  const unsigned short START_TO_START = 0;
+  const unsigned short START_TO_END = 1;
+  const unsigned short END_TO_END = 2;
+  const unsigned short END_TO_START = 3;
+  [Throws]
+  short compareBoundaryPoints(unsigned short how, Range sourceRange);
   // [Throws]
   // void deleteContents();
-  // [Throws]
+  // [NewObject, Throws]
   // DocumentFragment extractContents();
-  // [Throws]
+  // [NewObject, Throws]
   // DocumentFragment cloneContents();
   // [Throws]
   // void insertNode(Node node);
   // [Throws]
   // void surroundContents(Node newParent);
 
-  // Range cloneRange();
+  [NewObject]
+  Range cloneRange();
   void detach();
 
-  // [Throws]
-  // boolean isPointInRange(Node node, unsigned long offset);
-  // [Throws]
-  // short comparePoint(Node node, unsigned long offset);
+  [Throws]
+  boolean isPointInRange(Node node, unsigned long offset);
+  [Throws]
+  short comparePoint(Node node, unsigned long offset);
 
-  // [Throws]
-  // boolean intersectsNode(Node node);
+  boolean intersectsNode(Node node);
 
   // stringifier;
 };
 
-// https://domparsing.spec.whatwg.org/#dom-range-createcontextualfragment
+// https://dvcs.w3.org/hg/innerhtml/raw-file/tip/index.html#extensions-to-the-range-interface
 partial interface Range {
-  // [Throws]
+  // [NewObject, Throws]
   // DocumentFragment createContextualFragment(DOMString fragment);
 };// 
 
-////  http://dvcs.w3.org/hg/csswg/raw-file/tip/cssom-view/Overview.html#extensions-to-the-range-interface
+// http://dev.w3.org/csswg/cssom-view/#extensions-to-the-range-interface
 partial interface Range {
   // DOMRectList? getClientRects();
   // DOMRect getBoundingClientRect();